High-speed gang stone-sawing machine.



'PATENTED Nov; 17,1903.

' R. F. MoKINLEY. HIGH SPEED GANG STONE SAWING MAGHINBL APPLICATIONFILED MAR. 24, 1902.

2 SHEETS-SEEM 1.

.FO MODEL.

1 mm r0 Fum'mrmu. WASHING PATEN'TED NOV. 17, .1903;

No. 744,092 v R. F. McKINLEY. HIGH SPEED GANG STONE SAWING MACHINE.APPLIGATION FILED 14.33.24 1902. no MODEL. 2 sn'gms-snnnr 2.

a was rams cc mom-anon \KAQHNGTON, z

Patented November 1'7, 1903.

PATE T 0 EEicE.

ROBERT F. MGKINLEY, OF BEDFORD, INDIANA.

HlGH SPEED-GANG STONE-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 744,092, dated November17, 1903.. Application filed March 24,1902. Serial No. 99,685. (Nomodel.)

To on whom it may concern: 7

Be it known that I, ROBERT F. MOKINLEY, a citizen of the United States,residing at Bedford, in the county of Lawrence and State of Indiana,have invented a new and useful High-Speed Gang Stone-Sawing Machine, ofwhich the following isa specification;

My invention is an improved high-speed gang stone-sawing machine; and itconsists in the peculiar construction and-combination of deviceshereinafter fully set forth and claimed.

In the accompanying drawings, Figure 1 is a side elevation of astone-sawing machine embodying my improvements, parts of the same beingbroken away and parts shown in section. Fig. 2 is a detail transversesectional view of the same. Fig. 3 is partlya horizontal sectional viewand partly a top plan view of the same. Fig. 4 is a detail transversesectional view.

The main frame 1 is here shown as provided with vertical posts 2, havingtheir upper and lower ends connected together, respectively, by plates 3and sills 4, and at the ends of the said frame 1, at the corners thereofand just A vertically-movable carriage 7 is here shownascomprising apair of horizontallydisposed side beams 8 and a cross-beam 9, which isdisposed near the front ends of the beams 8 and is connected thereto ontheir lower sides, as at 10.

On the said beams 8 on the outer sides thereof are bolted traveling nuts11, which are engaged by verticallydisposed adjusting-screws 12. Thelatter have their lower ends stepped in bracketblocks 13, which arebolted or otherwise secured to the inner sides of the posts 2 and havetheir upper portions suitably journaled in bearings, (not shown,) withwhich the plates 3 are provided. At the upper ends of theadjusting-screws 12 are miter-gears 14, which engagesimilar gears 15 onlongitudinally-disposed shafts 16, which latter are journaled inbearings 17, that are here shown as bolted on the upper sides of theplates. A suitable mechanism such as is commonly employed in machines ofthis class is used to rotate the chine is in operation. screw-operatingmechanism not being of my shafts 16 in unison, automatically to revolvethe screws 12, and'henceraise or lower the carriage 7, as may berequired when the ma- The said adjustinginvention and being wellunderstood by those skilled in the art to which my invention relates isnot here shown.

The vertically-movable carriage 7 is provided on its side beams 8 atsuitable points with standards 18, at the upper ends of which arebearings 19. Transversely-disposed rockshafts 20 are journaled in thesaid bearings. Oscillating hangers 21 are secured to and depend from thesaid rock-shafts near the ends thereof, and each pair of the saidhangers is connected together by cross brace-rods 22.

The'said brace-rods are each provided with a turnbuckle 23,whereby saidbrace-rods may be lengthened or shortened, as may be reper sides of itsside bars, near the ends theremoved endwise and reciprocated between theside beams 8 0f the carriage 7, and it will be furtherunderstood thatowing to the provision of the hangers 21 by which the said gang-sawframe is suspended the latter will be caused to rise and fall as itreciprocates, and hence is adapted for reciprocatory oscillatory motion.7

On the cross-beam 9, at the front end of the vertically-movable carriage7 at points near the center of said beam,are secured standards 28, whichhave bearings 29 at their upper ends. Bearings 30 are also secured onthe side beams 8 of said vertically-movable carriage and disposed inline with the bearings 29, and a shaft 31 is journaled in said bearings29 30. The said shaft has crank-arms 32 at its center, which arms areconnected together bya pin 33. A pitman 34 engages the said crank-pin33, and the rear end of the pitman is pivotally connected to the frontend of the gang-saw frame 24 at the center thereof, as at 35. It will beunderstood from the foregoing that by rotating the shaft 31 thereciprocatory oscillatory motion hereinbefore described will be impartedto the gang-saw frame. On the said shaft 31, near the ends thereof, areshown fly-wheels 36. A pulley 37 is secured on the said shaft 31.

In Fig. 1 the line-shaft 38 is shown journaled in fixed bearings 39. Theline-shaft is provided with a pulley 40. Arms 41 have their upper endspivotally mounted on the line-shaft, said arms depending therefrom, andsaid arms have bearings at their lower ends for a counter-shaft 42. Thesame has a pulley 43,, which is connected to the pulley 40 of theline-shaft by a slack belt 44. When said belt is tightened, as by abelt-tightener 45, (shown in Figs. 1 and 3,) power is communicated fromthe line-shaft to the countershaft, as will be understood. Thecountershaft is further provided with a pulley 46, which is connected tothe pulley 37 on the crank-shaft 31 by an endless belt 47, and hencepower is communicated from the counfer-shaft to said crank-shaft 31,which drives the gang-saw frame. On the ends of the counter-shaft theouter ends of arms 48 are here shown as pivotally connected, and theinner ends of said arms 48 are pivotally connected to thevertically-movable frame 7, preferably at the inner sides of the sidebeams 8 of said frame near the front ends of said beams, as at 49. Itwill be understood that the said arms 48 keep the belt 47 sufficientlytight to drive the shaft 31,and that as the carriage 7 is movedvertically the said arms 48 serve to move the counter-shaftconcentrically with relation to the line-shaft. Hence the gang-saw framemay be driven irrespective of the adjustment or vertical disposition ofthe carriage 7.

It will be understood from the foregoing that the crank-shaft 31 is themember or element which directly applies power to the gang-saw frame toreciprocate and oscillate the latter, and that the said crank-shaft iscarried by the same carriage 7 which supports and vertically moves thegang-saw frame, and hence my machine is self-contained and the gang-sawframe and. the power element thereof are at all times maintained incorrect operative relative position, so that the operation of thegang-saw frame is not affected by the vertical adjustment of thecarriage 7. My improved sawing-machine is adapted to be operated at highspeed as compared with machines of this class heretofore constructed,hence greatly increasing the efficiency and capacity of my improvedmachine.

In Fig. 2 of the drawings I show catchbrackets 50, which in practice aresecured to the under sides of the beams 8 of carriage 7 in such positionthat their inner ends extend under the corners of the gang-saw frame andslightly below the same, the function of these catch-brackets being tocatch the gang-saw frame in the event that any of its supporting devicesshould become broken, and hence prevent the gang-saw frame from fallingand injuring the saws or the stone on which they maybe operating. Thebeams 8 of the carriage 7 are here shown as having plates 51 bolted ontheir upper sides at their ends, which plates are formed withguide-tongues 52, that engage and travel in the guidegrooves 6.

I do not desire to limit myself to the precise construction andcombination "of devices here-.

in shown and described, as it is evident that modifications may be madetherein without departing from the spirit of my invention.

Having thus described my invention, I claim 1. The combination in a gangsawing-machine, of a rigid frame including the uprights having verticalguiding-slots, 'uprights and longitudinal members forming supports foran adjusting mechanism, a vertically-adjustable frame having portionsentering the vertical guiding-slots, said adjustable frame being furtherheld from lateral play by the supporting-frame, standards carried by theadjustable frame, rock-shafts journaled in said standards and formingconnecting means between the spaced membersof said adjustable frame, agang-saw frame held from lateral play by the longitudinal members of theadjustable frame, hangers connecting the gangsaw frame to therock-shafts, a revoluble shaft, supporting-bearings carried by theadjustable frame, a crank on said shaft, a pitman connecting the crankto the gang-saw frame, means for driving the shaft and an adj ustingmeans for raising and lowering the adjustable frame.

2. The combination with a gang sawing-machine, of a frame including aplurality of spaced uprights, the end uprights being provided withvertical guiding-slots, an adjustable frame comprising a pair of spacedmem-.

bers having plates 51 provided with tongues for engaging the verticalguiding slots, a cross-bar connecting the two longitudinal members ofthe adjustable frame, bearings carried partly by the longitudinalmembers and the cross-bar of the frame, a crank-shaft adapted to saidbearings, a crank on said shaft, means for guiding the shaft, a pair ofsets of brackets or standards carried by the spaced longitudinal membersof the adj ustable frame, rock-shafts carried by the brackets andforming a connecting means between said longitudinal members, a gang-sawframe guided between said longitudinal members of the auxiliary frameand held thereby from lateral play, a pitman connecting said gang- Intestimony that I claim the foregoing as saw frame to the crank, hangersdepending my own I have hereto affixed my signature in I0 from therock-shafts and connected to the the presence of two witnesses.

- gang-saw frame, and auxiliary brackets ex- 7 a 5 tending inward fromthe under sides of the 7 ROBERT MOKINLEY' longitudinal members of theadj ustabie frame Witnesses: and serving as supports or catches for theC. S. NORTON, gang-saw frame in the event of breakage. EDWARD K. DYE.

